End connection for metallic hose-pipes.



E; WITZENMANN.

END CONNECTION FOR METALLIC HOSE PIPES.

APPLICATION FILED Horse. 1909.

959, 1 87. N Patnted May 24, 1910.

ll l'llzess'es: gen/01'.-

@ g. J 4! 6 gawz vzeys UNITEDv STATES PAT N OFFICE l EMIL WITZENMANN', OF PFORZHEIMfG ERMAN'Y.

END GONiNECFIION FOR METALLIC HOSE-PIPES.

Specification of Letters Patent.

Application filed November 30, 1909. Serial .No. 530,532.

To all whom it may concer'nf 1 Be it known that I, EMIL VVITZENMANN,

asubject of the Grand Duke ofBaden, re-

siding at. Pforzheim, Germany, have in vented certain new and useful. Improvementsin End Connections for Metallic Hose-Pipes,

of which the following is a specification. Thls invention relates to anend connection for spirally wound metallic hose made from metal bands of suitable profile.

Under my invention I provide an end con motion which is specially suitable for welded metallic hose in which the edges of the profile metal band are autogenously-welded ,together' and it consists in autogenously welding a ring shaped metal plate to the f Welded together at a end of the metal hose so that it forms a seat or. bearing for the packing which is in a known manner pressed between the end con necting pieces. V

The special endconnection as made under this invention has the. advantage of being both simple and cheap." Q In order that my invention may be clearly understood I have appended an explanatory drawing which shows partly in longitudinal section an end "connection made in accordance with my invention.

1 a designates the" spiral metal hose the butting'sections a ofwhich are autogenously b designates the conical mufi or collar which is screwed over the end of the hose.

c designates a protecting-gauze whiclr is secured in. a known manner by means of the flanges e and dand screws, bolts or such like.

To the end surface of the metal hose a a Patented May 24, 1910.

ring shaped plate 9 is secured by autogeso that the end next to the end comfect ion lies in a plane at right angles to the longitudinal axis of the hose. For this purpose and under this invention the last two screw threads of the hose are compressed or squeezed together, asshown on the drawing. The squeezing together of the last two screw threads is not absolutely necessary, as the plate 9 which is to be autogenously welded to the end of the spiral hose may also be secured thereto by cutting the end of the hose square before welding. Having now fully what I claim and de re to secure by Let ters Patent 'is:- i

An end connection for a spiral metallic hose pipe comprising, in combination, a pipe end, the spirals of-which are compremed together so as to form a square end, a mufi' and a ring shaped metal plate welded to the .squared end' of the pipe.

In testimon whereof I aflix my signature in presence 0 two witnesses.

EMIL WITZENMANN.

Witnesses:

Gr. CHARLES, HERMANN KRoNER.

scrlbed my invention 

